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[src/trunk]: src/sys Introduce rt_addrmsg_src which adds RTA_AUTHOR to the me...



details:   https://anonhg.NetBSD.org/src/rev/2237fbccb4c6
branches:  trunk
changeset: 450913:2237fbccb4c6
user:      roy <roy%NetBSD.org@localhost>
date:      Mon Apr 29 16:12:30 2019 +0000

description:
Introduce rt_addrmsg_src which adds RTA_AUTHOR to the message.
Use this when we notify userland of a duplicate address
and set RTA_AUTHOR to the hardware address of the sender.

While here, match the logging diagnostic of INET6 to the simpler one
of INET so it's consistent.

diffstat:

 sys/compat/common/rtsock_50.c |   7 +++-
 sys/compat/net/route.h        |   3 +-
 sys/kern/compat_stub.c        |   3 +-
 sys/net/route.h               |   3 +-
 sys/net/rtsock_shared.c       |  29 ++++++++++++++---
 sys/netinet/if_arp.c          |  39 +++++++++++++++---------
 sys/netinet6/nd6_nbr.c        |  67 +++++++++++++++++++++++++++---------------
 sys/sys/compat_stub.h         |   5 ++-
 8 files changed, 105 insertions(+), 51 deletions(-)

diffs (truncated from 434 to 300 lines):

diff -r f022fd687152 -r 2237fbccb4c6 sys/compat/common/rtsock_50.c
--- a/sys/compat/common/rtsock_50.c     Mon Apr 29 16:05:46 2019 +0000
+++ b/sys/compat/common/rtsock_50.c     Mon Apr 29 16:12:30 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: rtsock_50.c,v 1.12 2019/04/29 11:57:22 roy Exp $       */
+/*     $NetBSD: rtsock_50.c,v 1.13 2019/04/29 16:12:30 roy Exp $       */
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -61,7 +61,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: rtsock_50.c,v 1.12 2019/04/29 11:57:22 roy Exp $");
+__KERNEL_RCSID(0, "$NetBSD: rtsock_50.c,v 1.13 2019/04/29 16:12:30 roy Exp $");
 
 #define        COMPAT_RTSOCK   /* Use the COMPATNAME/COMPATCALL macros and the
                         * various other compat definitions - see
@@ -162,6 +162,8 @@
        MODULE_HOOK_SET(rtsock_rt_ifmsg_50_hook, "rts_50", compat_50_rt_ifmsg);
        MODULE_HOOK_SET(rtsock_rt_addrmsg_rt_50_hook, "rts_50",
            compat_50_rt_addrmsg_rt);
+       MODULE_HOOK_SET(rtsock_rt_addrmsg_src_50_hook, "rts_50",
+           compat_50_rt_addrmsg_src);
        MODULE_HOOK_SET(rtsock_rt_addrmsg_50_hook, "rts_50",
            compat_50_rt_addrmsg);
        MODULE_HOOK_SET(rtsock_rt_ifannouncemsg_50_hook, "rts_50",
@@ -181,6 +183,7 @@
        MODULE_HOOK_UNSET(rtsock_rt_missmsg_50_hook); 
        MODULE_HOOK_UNSET(rtsock_rt_ifmsg_50_hook); 
        MODULE_HOOK_UNSET(rtsock_rt_addrmsg_rt_50_hook); 
+       MODULE_HOOK_UNSET(rtsock_rt_addrmsg_src_50_hook); 
        MODULE_HOOK_UNSET(rtsock_rt_addrmsg_50_hook); 
        MODULE_HOOK_UNSET(rtsock_rt_ifannouncemsg_50_hook); 
        MODULE_HOOK_UNSET(rtsock_rt_ieee80211msg_50_hook); 
diff -r f022fd687152 -r 2237fbccb4c6 sys/compat/net/route.h
--- a/sys/compat/net/route.h    Mon Apr 29 16:05:46 2019 +0000
+++ b/sys/compat/net/route.h    Mon Apr 29 16:12:30 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: route.h,v 1.3 2019/04/29 11:57:22 roy Exp $    */
+/*     $NetBSD: route.h,v 1.4 2019/04/29 16:12:30 roy Exp $    */
 
 /*
  * Copyright (c) 1980, 1986, 1993
@@ -88,6 +88,7 @@
 struct mbuf *
        compat_50_rt_msg1(int, struct rt_addrinfo *, void *, int);
 void   compat_50_rt_addrmsg_rt(int, struct ifaddr *, int, struct rtentry *);
+void   compat_50_rt_addrmsg_src(int, struct ifaddr *, const struct sockaddr *);
 void   compat_50_rt_addrmsg(int, struct ifaddr *);
 void   compat_70_rt_newaddrmsg1(int, struct ifaddr *);
 #endif
diff -r f022fd687152 -r 2237fbccb4c6 sys/kern/compat_stub.c
--- a/sys/kern/compat_stub.c    Mon Apr 29 16:05:46 2019 +0000
+++ b/sys/kern/compat_stub.c    Mon Apr 29 16:12:30 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: compat_stub.c,v 1.10 2019/04/29 11:57:22 roy Exp $ */
+/* $NetBSD: compat_stub.c,v 1.11 2019/04/29 16:12:30 roy Exp $ */
 
 /*-
  * Copyright (c) 2018 The NetBSD Foundation, Inc.
@@ -204,6 +204,7 @@
 struct rtsock_rt_ifmsg_50_hook_t rtsock_rt_ifmsg_50_hook;
 struct rtsock_rt_ifannouncemsg_50_hook_t rtsock_rt_ifannouncemsg_50_hook;
 struct rtsock_rt_addrmsg_rt_50_hook_t rtsock_rt_addrmsg_rt_50_hook;
+struct rtsock_rt_addrmsg_src_50_hook_t rtsock_rt_addrmsg_src_50_hook;
 struct rtsock_rt_addrmsg_50_hook_t rtsock_rt_addrmsg_50_hook;
 struct rtsock_rt_ieee80211msg_50_hook_t rtsock_rt_ieee80211msg_50_hook;
 
diff -r f022fd687152 -r 2237fbccb4c6 sys/net/route.h
--- a/sys/net/route.h   Mon Apr 29 16:05:46 2019 +0000
+++ b/sys/net/route.h   Mon Apr 29 16:12:30 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: route.h,v 1.122 2019/04/29 11:57:22 roy Exp $  */
+/*     $NetBSD: route.h,v 1.123 2019/04/29 16:12:30 roy Exp $  */
 
 /*
  * Copyright (c) 1980, 1986, 1993
@@ -516,6 +516,7 @@
        rt_msg1(int, struct rt_addrinfo *, void *, int);
 int    rt_msg3(int, struct rt_addrinfo *, void *, struct rt_walkarg *, int *);
 void   rt_addrmsg(int, struct ifaddr *);
+void   rt_addrmsg_src(int, struct ifaddr *, const struct sockaddr *);
 void   rt_addrmsg_rt(int, struct ifaddr *, int, struct rtentry *);
 void   route_enqueue(struct mbuf *, int);
 
diff -r f022fd687152 -r 2237fbccb4c6 sys/net/rtsock_shared.c
--- a/sys/net/rtsock_shared.c   Mon Apr 29 16:05:46 2019 +0000
+++ b/sys/net/rtsock_shared.c   Mon Apr 29 16:12:30 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: rtsock_shared.c,v 1.7 2019/04/29 11:57:22 roy Exp $    */
+/*     $NetBSD: rtsock_shared.c,v 1.8 2019/04/29 16:12:30 roy Exp $    */
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -61,7 +61,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: rtsock_shared.c,v 1.7 2019/04/29 11:57:22 roy Exp $");
+__KERNEL_RCSID(0, "$NetBSD: rtsock_shared.c,v 1.8 2019/04/29 16:12:30 roy Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_inet.h"
@@ -1364,9 +1364,9 @@
  * be unnecessary as the routing socket will automatically generate
  * copies of it.
  */
-void
-COMPATNAME(rt_addrmsg_rt)(int cmd, struct ifaddr *ifa, int error,
-    struct rtentry *rt)
+static void
+COMPATNAME(rt_addrmsg0)(int cmd, struct ifaddr *ifa, int error,
+    struct rtentry *rt, const struct sockaddr *src)
 {
 #define        cmdpass(__cmd, __pass)  (((__cmd) << 2) | (__pass))
        struct rt_addrinfo info;
@@ -1428,6 +1428,7 @@
                        info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr;
                        info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask;
                        info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr;
+                       info.rti_info[RTAX_AUTHOR] = src;
                        memset(&ifam, 0, sizeof(ifam));
                        ifam.ifam_index = ifp->if_index;
                        ifam.ifam_metric = ifa->ifa_metric;
@@ -1473,7 +1474,23 @@
 COMPATNAME(rt_addrmsg)(int cmd, struct ifaddr *ifa)
 {
 
-       COMPATNAME(rt_addrmsg_rt)(cmd, ifa, 0, NULL);
+       COMPATNAME(rt_addrmsg0)(cmd, ifa, 0, NULL, NULL);
+}
+
+void
+COMPATNAME(rt_addrmsg_rt)(int cmd, struct ifaddr *ifa, int error,
+    struct rtentry *rt)
+{
+
+       COMPATNAME(rt_addrmsg0)(cmd, ifa, error, rt, NULL);
+}
+
+void
+COMPATNAME(rt_addrmsg_src)(int cmd, struct ifaddr *ifa,
+    const struct sockaddr *src)
+{
+
+       COMPATNAME(rt_addrmsg0)(cmd, ifa, 0, NULL, src);
 }
 
 static struct mbuf *
diff -r f022fd687152 -r 2237fbccb4c6 sys/netinet/if_arp.c
--- a/sys/netinet/if_arp.c      Mon Apr 29 16:05:46 2019 +0000
+++ b/sys/netinet/if_arp.c      Mon Apr 29 16:12:30 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_arp.c,v 1.281 2019/04/29 16:05:46 roy Exp $ */
+/*     $NetBSD: if_arp.c,v 1.282 2019/04/29 16:12:30 roy Exp $ */
 
 /*
  * Copyright (c) 1998, 2000, 2008 The NetBSD Foundation, Inc.
@@ -68,7 +68,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_arp.c,v 1.281 2019/04/29 16:05:46 roy Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_arp.c,v 1.282 2019/04/29 16:12:30 roy Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_ddb.h"
@@ -176,7 +176,7 @@
 static void arp_dad_timer(struct dadq *);
 static void arp_dad_start(struct ifaddr *);
 static void arp_dad_stop(struct ifaddr *);
-static void arp_dad_duplicated(struct ifaddr *, const char *);
+static void arp_dad_duplicated(struct ifaddr *, const struct sockaddr_dl *);
 
 static void arp_init_llentry(struct ifnet *, struct llentry *);
 #if NTOKEN > 0
@@ -1005,7 +1005,6 @@
        uint64_t *arps;
        struct psref psref, psref_ia;
        int s;
-       char llabuf[LLA_ADDRSTRLEN], *llastr;
        char ipbuf[INET_ADDRSTRLEN];
        bool do_dad;
 
@@ -1149,9 +1148,12 @@
            (in_nullhost(isaddr) && in_hosteq(itaddr, myaddr) &&
             m->m_flags & M_BCAST)))
        {
-               llastr = lla_snprintf(llabuf, sizeof(llabuf),
-                   ar_sha(ah), ah->ar_hln);
-               arp_dad_duplicated((struct ifaddr *)ia, llastr);
+               struct sockaddr_dl sdl, *sdlp;
+
+               sdlp = sockaddr_dl_init(&sdl, sizeof(sdl),
+                   ifp->if_index, ifp->if_type,
+                   NULL, 0, ar_sha(ah), ah->ar_hln);
+               arp_dad_duplicated((struct ifaddr *)ia, sdlp);
                goto out;
        }
 
@@ -1176,6 +1178,8 @@
        if ((la->la_flags & LLE_VALID) &&
            memcmp(ar_sha(ah), &la->ll_addr, ifp->if_addrlen))
        {
+               char llabuf[LLA_ADDRSTRLEN], *llastr;
+
                llastr = lla_snprintf(llabuf, sizeof(llabuf),
                    ar_sha(ah), ah->ar_hln);
 
@@ -1753,38 +1757,43 @@
 }
 
 static void
-arp_dad_duplicated(struct ifaddr *ifa, const char *sha)
+arp_dad_duplicated(struct ifaddr *ifa, const struct sockaddr_dl *from)
 {
        struct in_ifaddr *ia = (struct in_ifaddr *)ifa;
        struct ifnet *ifp = ifa->ifa_ifp;
-       char ipbuf[INET_ADDRSTRLEN];
-       const char *iastr;
+       char ipbuf[INET_ADDRSTRLEN], llabuf[LLA_ADDRSTRLEN];
+       const char *iastr, *llastr;
 
        iastr = IN_PRINT(ipbuf, &ia->ia_addr.sin_addr);
+       if (__predict_false(from == NULL))
+               llastr = NULL;
+       else
+               llastr = lla_snprintf(llabuf, sizeof(llabuf),
+                   CLLADDR(from), from->sdl_alen);
 
        if (ia->ia4_flags & (IN_IFF_TENTATIVE|IN_IFF_DUPLICATED)) {
                log(LOG_ERR,
                    "%s: DAD duplicate address %s from %s\n",
-                   if_name(ifp), iastr, sha);
+                   if_name(ifp), iastr, llastr);
        } else if (ia->ia_dad_defended == 0 ||
                   ia->ia_dad_defended < time_uptime - DEFEND_INTERVAL) {
                ia->ia_dad_defended = time_uptime;
                arpannounce1(ifa);
                log(LOG_ERR,
                    "%s: DAD defended address %s from %s\n",
-                   if_name(ifp), iastr, sha);
+                   if_name(ifp), iastr, llastr);
                return;
        } else {
                /* If DAD is disabled, just report the duplicate. */
                if (!ip_dad_enabled()) {
                        log(LOG_ERR,
                            "%s: DAD ignoring duplicate address %s from %s\n",
-                           if_name(ifp), iastr, sha);
+                           if_name(ifp), iastr, llastr);
                        return;
                }
                log(LOG_ERR,
                    "%s: DAD defence failed for %s from %s\n",
-                   if_name(ifp), iastr, sha);
+                   if_name(ifp), iastr, llastr);
        }
 
        arp_dad_stop(ifa);
@@ -1793,7 +1802,7 @@
        if ((ia->ia4_flags & IN_IFF_DUPLICATED) == 0) {
                ia->ia4_flags |= IN_IFF_DUPLICATED;
                /* Inform the routing socket of the duplicate address */
-               rt_addrmsg(RTM_NEWADDR, ifa);
+               rt_addrmsg_src(RTM_NEWADDR, ifa, (const struct sockaddr *)from);
        }
 }
 
diff -r f022fd687152 -r 2237fbccb4c6 sys/netinet6/nd6_nbr.c
--- a/sys/netinet6/nd6_nbr.c    Mon Apr 29 16:05:46 2019 +0000
+++ b/sys/netinet6/nd6_nbr.c    Mon Apr 29 16:12:30 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: nd6_nbr.c,v 1.165 2019/04/29 11:57:22 roy Exp $        */
+/*     $NetBSD: nd6_nbr.c,v 1.166 2019/04/29 16:12:30 roy Exp $        */
 /*     $KAME: nd6_nbr.c,v 1.61 2001/02/10 16:06:14 jinmei Exp $        */
 
 /*
@@ -31,7 +31,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: nd6_nbr.c,v 1.165 2019/04/29 11:57:22 roy Exp $");
+__KERNEL_RCSID(0, "$NetBSD: nd6_nbr.c,v 1.166 2019/04/29 16:12:30 roy Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_inet.h"
@@ -82,8 +82,10 @@
 static void nd6_dad_destroytimer(struct dadq *);
 static void nd6_dad_timer(struct dadq *);
 static void nd6_dad_ns_output(struct dadq *, struct ifaddr *);
-static void nd6_dad_input(struct ifaddr *, struct nd_opt_nonce *);
-static void nd6_dad_duplicated(struct ifaddr *, struct dadq *);
+static void nd6_dad_input(struct ifaddr *, struct nd_opt_nonce *,
+    const struct sockaddr_dl *);
+static void nd6_dad_duplicated(struct ifaddr *, struct dadq *,
+    const struct sockaddr_dl *);
 
 static int dad_maxtry = 15;    /* max # of *tries* to transmit DAD packet */



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